$def with(greeting)
<!--greeting is a paramter-->
 <html>
 	<head>
 		<title>test greeting</title>
 	</head>
 	<body>
	
	$if greeting:
		I just wanted to say <em style= "color:red; font-size:2em">$greeting</em>
	$else:
		<em>Hello</em>,world!
	
	
	</body>
 </html>